Gold alloy



Patented Sept. 24, 1935 The Beryllium Corporation, New York, N. Y. a corporation of Delaware No Drawing Application December 22, 1931, Serial N0. 582,654

2 Claims.

This invention relates to gold alloys of high gold content characterized by great hardness.

Known alloys of high gold content are, almost uniformly, extremely soft and, therefore, nonresistant to wear. Yet some commercial necessities of maintaining a high gold proportion has made it difiicult to increase the hardness of the precious metal.

I have found that beryllium, added in relatively small quantities, not over 5% in total, conIers upon gold and alloys predominant in gold 'the hardness desired. As little as 0.2% is definitely effective, and the optimum ratio, for most work,

is between 0.5% and 1.0%.

Of course, the usual gold alloying elements,

such as copper, silver, nickel and aluminum, may

also be added, in order to reduce the carat value of the gold article or to impart special mechanical characteristics to it, but the hardening eflect resulting from the use of beryllium remains unchanged as long as the alloy predominates in gold.

1. An alloy composed of gold and beryllium, the latter being present in amounts from .2% to 5%.

2. An alloy composed of gold and beryllium, the latter being present in amounts from 5% to 1%.

JOSEPH KENT SMITH. 

